They say be at the airport 3 hours before an international flight, which would be 3:30 am. But are the airline counters even open at that time of the morning? We will be traveling to Dublin (Aer Lingus) and connecting to San Francisco, and checking bags. Can I just check in online via the app, and is there a kiosk at the airport for luggage? It is impossible to get hold of a live person at Aer Lingus.
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